[An unusual case of intracranial lipomatosis and cerebral aneurysm].

An unusual combination of a fusiform aneurysm on the middle cerebral artery branch to the central region and cortical lipomatosis is described. The etiology of lipomatous disorders in the brain are multiple. The possibility of a combined dysplasia based on maldifferentiation of primitive meninges and the arterial wall is suggested in this case. Treatment consisted in uneventful, microsurgical image-guided resection of the aneurysm using the Surgiscope robotic system.